Correct me if I;m wrong but it sounds like Ubisoft will be the first AAA pubs/devs to actually throw out 4k textures, most AAA devs so far have only started supporting 4k res but I can't say I've heard of both 4k res and textures. I do hope more devs create 4k textures though as well as support the res, if most do that within the next 2-3 years I might actually bite the costs and go for a 4k build sooner than later.
We've yet to see how decent and high quality these textures are so I'll wait and see.
Mankind, in its arrogance and self-delusion, must believe they are the mirrors to God in both their image and their power. If something shatters that mirror, then it must be totally destroyed.